The viscosity of lube oils is expressed with a cold grade (number before the letter W) and a hot grade (for example: 10W40).
The higher the numbers, the higher the viscosity.
Thus, an oil with a low grade will allow fuel economy by limiting friction while a high grade will allow the formation of a thicker film between moving parts for better protection.
In the case of an engine oil, you must refer to the manufacturer’s recommendations when choosing the viscosity grade.
You can refer to our online recommendation tool to find the right oil for your vehicle
